Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/40-18 | 28/10-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.24 (717.2) | 28 (711.2) | -0.24 (-6) -0.8% |
| Width inches (mm) | 12.8 (325) | 10 (254) | -2.8 (-71) -21.8% |
| Circum. inches (mm) | 88.71 (2253.15) | 87.96 (2234.3) | -0.74 (-18.85) -0.8% |
| Sidewall Height inches (mm) | 5.12 (130) | 6.5 (165.1) | 1.38 (35.1) 27% |
| Revolutions per mile (km) | 714.26 (443.82) | 720.29 (447.57) | 6.03 (3.74) 0.8% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.83 mph (31.92 km/h) |
| 25 mph (40.23 km/h) | 24.79 mph (39.9 km/h) |
| 30 mph (48.28 km/h) | 29.75 mph (47.88 km/h) |
| 35 mph (56.33 km/h) | 34.71 mph (55.86 km/h) |
| 40 mph (64.37 km/h) | 39.67 mph (63.84 km/h) |
| 45 mph (72.42 km/h) | 44.62 mph (71.81 km/h) |
| 50 mph (80.47 km/h) | 49.58 mph (79.79 km/h) |
| 55 mph (88.51 km/h) | 54.54 mph (87.77 km/h) |
| 60 mph (96.56 km/h) | 59.5 mph (95.75 km/h) |
| 65 mph (104.61 km/h) | 64.46 mph (103.73 km/h) |
| 70 mph (112.65 km/h) | 69.41 mph (111.71 km/h) |
| 75 mph (120.7 km/h) | 74.37 mph (119.69 km/h) |
| 80 mph (128.75 km/h) | 79.33 mph (127.67 km/h) |
| 85 mph (136.79 km/h) | 84.29 mph (135.65 km/h) |
| 90 mph (144.84 km/h) | 89.25 mph (143.63 km/h) |
| 95 mph (152.89 km/h) | 94.21 mph (151.61 km/h) |
| 100 mph (160.93 km/h) | 99.16 mph (159.59 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1833 | 2129 | 2293 | 2395 | 2504 | 2582 | 2668 | 2769 | 2909 | 3050 | 3206 | 3331 | 3557 | 3806 | 4001 | 4126 | 4196 | 4454 | 4813 | 5593 |
Better Fuel Economy Factory Ratios Increased Power
